Walther Trowal has introduced its redesigned Rotamat R80, which compared to its predecessor model offers not only a higher operational flexibility but also a higher capacity for coating of plastic components.
With the drum coating method the small parts no longer have to be individually placed on special racks but can be loaded into the Rotamat drum in relatively large batch sizes. This technology is designed for treating small parts made from different plastic materials like elastomers, ABS, PC or PS. Water based as well as solvent based paints can be processed.
Building on the success of the predecessor models Walther Trowal completely revamped the Rotamat range, and with the R80 is introducing a machine that can be even better adapted to the individual requirements of the users. The modular filtering system is designed to allow not only cleaning the exhaust air up to filter class F6, but also allows spraying more solvent based paint, offering a higher part throughput without jeopardizing compliance with the prevailing clean air standards.
New Technical Features
The new Rotamat R80 from Walther Trowal has a drum diameter of 800 mm and can handle about 50 kg of parts with a batch volume of 50 liters. "This batch size meets the requirements of many customers who must coat delicate, complex shaped parts or are processing relatively heavy parts like metal components," said a company spokesperson. The new R80 is also available with a drum that offers a diameter of 700 mm and a usable part volume of 30 liters. The airflow and the paint application system were optimized to a point where only a very small amount of overspray is created. The inside of the coating drum is equipped with an explosion protected LED light allowing precise observation of the coating process, be it the paint layer buildup or color changes.
The new heating control system is engineered to help reduce cycle times and energy consumption. A PID controller adjusts the inlet air temperature in relation to the workpiece temperature. At the same time it takes into consideration the actual air volume. "The new controller reacts quickly. This quick reaction and the better insulation of the drum allowed reducing the electrical energy requirements to 9 kW," said the spokesperson.
Air Filtration
"With the new exhaust air filter unit Walther Trowal enhanced the possibility for using different paints. This is an important feature for those customers who must coat a large variety of parts with different types of paint," said the spokesperson. The R80 offers four independently usable stages for filtering the exhaust air so that the particle sizes caught by the filter system can vary within a relatively large range up to filter class F6. The new filter unit also contributes to a higher part throughput: The user can now use more solvent, thus, speed up the coating process and still meet the standards for the maximum solvent concentration at the work place. Another feature of the new filtration system is the secondary air system that allows the connection to a thermal post combustion installation, which may be already available to the customers. The secondary air system limits the air volume pulled by the thermal post combustion installation so that the coating process is not affected.
For more information contact:
Walther Trowal GmbH&Co.KG
4540 East Paris Ave. SE, Suite F
Grand Rapids, MI 49512
616-455-8940
www.walther-trowal.com